\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes,}
\begin{document}
\small
\begin{tikzpicture}[>=stealth,scale=0.9]
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  \draw [thick](-2,0)--(1,0);
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  \draw[fill=black] (-.5, 1.5/2) circle (1pt); 
  \draw[fill=black,rotate=-30] (-.5, 1.5/2) circle (1pt); 
  \draw [->, thick, rotate=-30](-.5, 1.5/2)--+(-60:1.6);
  \draw[->] (0,2) arc (90:110: 2);
  \node at (-.5, 1.5/2)[above]{$C$};
  \node at (0, 1.5/2+.1)[above]{$C$};
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    \draw[fill=black] (-.5, 2.5/2) circle (1pt); 
    \draw[fill=black,rotate=-30] (-.5, 2.5/2) circle (1pt); 
    \draw [->, thick, rotate=-30](-.5, 2.5/2)--+(-60:2);
    \draw[->] (0,3) arc (90:70: 3);
    \node at (-.5, 2.5/2)[above]{$C$};
    \node at (0.2, 2.5/2+.1)[above]{$C$};
  \end{scope}
\end{tikzpicture}
\end{document}